Amorphous Vanadium Oxide Thin Films as Stable Performing Cathodes of Lithium and Sodium-Ion Batteries

Table 5 Na-ion battery cycling performance of a-VOx films and at 0.1 C current rate

Name	Voltage (V)	1st charge capacity (mAh g⁻¹)	100th charge capacity (mAh g⁻¹)	Capacity retention at 100th charge (%)
a-VOx-6 Pa	1.5–4.0	128	118	92
a-VOx-13 Pa	1.5–4.0	162	136	84
a-VOx-30 Pa	1.5–4.0	184	22	12